Add config fragment for new i18n ordering system
Simplified travis builds (external setup scripts)
composer/installers dep workaround

Moved to end of requirements, to work around a bug in composer - see https://github.com/composer/composer/issues/1147. This caused the dependencies to be installed in the wrong folder because the custom 'silverstripe-module' instructions hadn't been loaded at the time the core modules were installed via composer.
Merge remote-tracking branch 'origin/2.4' into 3.0

Conflicts:
	.travis.yml
	composer.json
Update github path
Add default params to _t() calls to ensure if a translation isn't found, it falls back to a useful English string
Merge pull request #751 from madmatt/fix_for_cms_issue_750

Fix Issue #750
Merge pull request #186 from silverstripe-rebelalliance/api/translation_priority

Add config fragment for new i18n ordering system
Updated translations
Behat: Auto-publishing SiteTree fixtures, RedirectorPage fixtures

They can be unpublished through an explicit step.
Extending from base FeatureContext in order to easily
share the same FixtureFactory but still add new blueprints to it.
Behat: Replace @database-defaults with explicit fixtures
Behat: Fixed spelling in test
More verbose fixture step definitions

Too many clashes with other steps otherwise,
e.g. with 'And the preview contains "You can fill"'.
Also removed some duplicated code no longer necessary
because we use inheritance rather than composition
FIX #651 Broken redirection after creating new folder in assets
PHP 5.5 CI, don't allow failures for sqlite3 and postgres
Remove PHP 5.5 from allowed failures
Adds LoginForm as an allowed action

Behaves as a form method defined on ContentController
Translations: Switch to Transifex format

- Based on new (last) translation download from getlocalization.com
- Removed untranslated strings. Getlocalization started including those at some point
which is highly annoying, unnecessary and breaks the new transfix system,
since it'll mark all of the english strings as actual translations
- Avoid dots in entities. It confuses the Transifex YML parser
- Removed some locales unknown to Transifex which didn't have any translations anyway
- Removed "lolcat" locale, uses custom notation (en@lolcal)
  which SilverStripe's i18n system can't handle
  (needs mapping from SS naming to Zend naming)
- Renamed "Te Reo/Maori" locale from "mi_NZ" to "mi" (Transifex/CLDR notation)
- Namespaced all entities used in templates (deprecated usage)
- Converted dots to underscores where template filenames are used for namespaces,
since Transifex YML parsing handles them as separate YML keys otherwise
- Removed whitespace in entity names, SilverStripe i18n can't handle it
Merge pull request #820 from chillu/pulls/transifex-3.0

Translations: Switch to Transifex format (3.0)
FIX ArchiveDate enforcement